Data Sheet

Bosch Sensortec | BME280 Data sheet
48 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
7.11 Mounting and assembly recommendations
In order to achieve the specified performance for you design, the following recommendations and the
“Handling, soldering & mounting instructions BME280” should be taken into consideration when
mounting a pressure sensor on a printed-circuit board (PCB):
 The clearance above the metal lid shall be 0.1mm at minimum.
 For the device housing appropriate venting needs to be provided in case the ambient pressure
shall be measured.
 Liquids shall not come into direct contact with the device.
 During operation the sensor chip is sensitive to light, which can influence the accuracy of the
measurement (photo-current of silicon). The position of the vent hole minimizes the light
exposure of the sensor chip. Nevertheless, Bosch Sensortec recommends avoiding the
exposure of BME280 to strong light sources.
 Soldering may not be done using vapor phase processes since the sensor will be damaged by
the liquids used in these processes.
7.12 Environmental safety
7.12.1 RoHS
The BME280 sensor meets the requirements of the EC restriction of hazardous substances (RoHS)
directive, see also:
Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the
restriction of the use of certain hazardous substances in electrical and electronic equipment.
7.12.2 Halogen content
The BME280 is halogen-free. For more details on the analysis results please contact your Bosch
Sensortec representative.
7.12.3 Internal package structure
Within the scope of Bosch Sensortec’s ambition to improve its products and secure the mass product
supply, Bosch Sensortec qualifies additional sources (e.g. 2
nd
source) for the package of the BME280.
While Bosch Sensortec took care that all of the technical packages parameters are described above
are 100% identical for all sources, there can be differences in the chemical content and the internal
structural between the different package sources.
However, as secured by the extensive product qualification process of Bosch Sensortec, this has no
impact to the usage or to the quality of the BME280 product.